From 68dafbd7a0f438ea9cc0d975d58ebf2ccab77474 Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Thu, 27 Nov 2025 16:35:13 +0000
Subject: [PATCH] sys-libs/zlib-ng: add 2.3.1

Signed-off-by: Sam James <sam@gentoo.org>
---
 sys-libs/zlib-ng/Manifest             |   1 +
 sys-libs/zlib-ng/zlib-ng-2.3.1.ebuild | 117 ++++++++++++++++++++++++++
 2 files changed, 118 insertions(+)
 create mode 100644 sys-libs/zlib-ng/zlib-ng-2.3.1.ebuild

diff --git a/sys-libs/zlib-ng/Manifest b/sys-libs/zlib-ng/Manifest
index 848476fb5665..0b5c73efc342 100644
--- a/sys-libs/zlib-ng/Manifest
+++ b/sys-libs/zlib-ng/Manifest
@@ -1 +1,2 @@
 DIST zlib-ng-2.2.5.tar.gz 2417402 BLAKE2B 7d2907595b6e57f2739f4acea11cb317a35c4f63208d3f44b65cca0ea1ffbef89311bc839327e037b3aea78de1407d3ff025567f6768013277d0fd61e0a40210 SHA512 b599ea24375d08fa098ed7c3b14548e0d9731a155a024a0904b0ae4a6d3491a69f0c0574d66b6e4af1e40f10e38b6b555d4c4b1fe3589ca83a5f97fbd92f635f
+DIST zlib-ng-2.3.1.tar.gz 2446619 BLAKE2B 95980177e7fa8b8affd09fd8eb18c9d2d80781c0fd56cd66b24388299255c71477317aef5f0dbb56235fc29b3685c72daf2908f38f6a95006e56824535073071 SHA512 33722bfdd7d4f0b41f4ac99edcfd1a0f26aa52f86b1c16ce2e63962c26f8f8239634acef33051958f96b9593c29b7dedb29b136e710005de88fbb4cf40228a85
diff --git a/sys-libs/zlib-ng/zlib-ng-2.3.1.ebuild b/sys-libs/zlib-ng/zlib-ng-2.3.1.ebuild
new file mode 100644
index 000000000000..df4827a76256
--- /dev/null
+++ b/sys-libs/zlib-ng/zlib-ng-2.3.1.ebuild
@@ -0,0 +1,117 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+# Worth keeping an eye on 'develop' branch upstream for possible backports,
+# as they copied this practice from sys-libs/zlib upstream.
+
+inherit cmake-multilib multibuild
+
+DESCRIPTION="Fork of the zlib data compression library"
+HOMEPAGE="https://github.com/zlib-ng/zlib-ng"
+SRC_URI="https://github.com/${PN}/${PN}/archive/${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="ZLIB"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86"
+
+CPU_USE=(
+	x86_{avx2,avx512f,avx512_vnni,sse2,ssse3,sse4_1,sse4_2,pclmul,vpclmulqdq}
+	arm_{crc32,neon}
+	ppc_{altivec,vsx2,vsx3}
+)
+IUSE="compat ${CPU_USE[@]/#/cpu_flags_} static-libs test"
+
+RESTRICT="!test? ( test )"
+
+DEPEND="
+	test? ( dev-cpp/gtest )
+"
+RDEPEND="
+	compat? ( !sys-libs/zlib )
+"
+
+run_both() {
+	local MULTIBUILD_VARIANTS=( base )
+	use compat && MULTIBUILD_VARIANTS+=( compat )
+
+	multibuild_foreach_variant "${@}"
+}
+
+my_src_configure() {
+	local compat=OFF
+	[[ ${MULTIBUILD_VARIANT} == compat ]] && compat=ON
+	local mycmakeargs=(
+		"${mycmakeargs[@]}"
+		-DZLIB_COMPAT="${compat}"
+	)
+
+	cmake_src_configure
+}
+
+multilib_src_configure() {
+	local mycmakeargs=(
+		-DBUILD_TESTING=$(usex test)
+		-DWITH_BENCHMARKS=OFF
+		-DWITH_BENCHMARK_APPS=OFF
+		-DWITH_FUZZERS=OFF
+		-DWITH_GTEST=$(usex test)
+	)
+	if use static-libs; then
+		mycmakeargs+=(
+			# upstream build system builds both if BUILD_SHARED_LIBS is unset
+			-UBUILD_SHARED_LIBS
+		)
+	fi
+
+	# The intrinsics options are all defined conditionally, so we need
+	# to enable them on/off per-arch here for now.
+	# TODO: There's no s390x USE_EXPAND yet
+	if use amd64 || use x86 ; then
+		mycmakeargs+=(
+			-DWITH_AVX2=$(usex cpu_flags_x86_avx2)
+			-DWITH_AVX512=$(usex cpu_flags_x86_avx512f)
+			-DWITH_AVX512VNNI=$(usex cpu_flags_x86_avx512_vnni)
+			-DWITH_SSE2=$(usex cpu_flags_x86_sse2)
+			-DWITH_SSSE3=$(usex cpu_flags_x86_ssse3)
+			-DWITH_SSE41=$(usex cpu_flags_x86_sse4_1)
+			-DWITH_SSE42=$(usex cpu_flags_x86_sse4_2)
+			-DWITH_PCLMULQDQ=$(usex cpu_flags_x86_pclmul)
+			-DWITH_VPCLMULQDQ=$(usex cpu_flags_x86_vpclmulqdq)
+		)
+	fi
+
+	if use arm || use arm64 ; then
+		mycmakeargs+=(
+			-DWITH_ARMV8=$(usex cpu_flags_arm_crc32)
+			-DWITH_NEON=$(usex cpu_flags_arm_neon)
+		)
+	fi
+
+	if use ppc || use ppc64 ; then
+		# The POWER8 support is VSX which was introduced
+		# VSX2 was introduced with POWER8, so use that as a proxy for it
+		mycmakeargs+=(
+			-DWITH_ALTIVEC=$(usex cpu_flags_ppc_altivec)
+			-DWITH_POWER8=$(usex cpu_flags_ppc_vsx2)
+			-DWITH_POWER9=$(usex cpu_flags_ppc_vsx3)
+		)
+	fi
+
+	run_both my_src_configure
+}
+
+multilib_src_compile() { run_both cmake_src_compile; }
+multilib_src_test() { run_both cmake_src_test; }
+multilib_src_install() { run_both cmake_src_install; }
+
+pkg_postinst() {
+	if use compat ; then
+		ewarn "zlib-ng is experimental and replacing the system zlib is dangerous"
+		ewarn "Please be careful!"
+		ewarn
+		ewarn "The following link explains the guarantees (and what is NOT guaranteed):"
+		ewarn "https://github.com/zlib-ng/zlib-ng/blob/2.0.x/PORTING.md"
+	fi
+}